"But put on the Lord Jesus Christ, and make no provision for the flesh, to fulfill its lusts."
How do we "put on the Lord Jesus Christ"? It is an intentional act of a regenerated will, that, by faith, covers one's soul with Jesus and His righteousness--much like a person would put on an overcoat. When we "put on Jesus," we are, of necessity, also "taking off" everything that is in opposition to Him, viz. known sin.
The "flesh" will always be with us in this world. The way to "disable" it, is not by trying to take it on, one-on-one. We are no match for it. Instead, we pit our Savior against it. The flesh has no power against the Son of God.
[Puritan quote of the day: "Therefore, now go to Jesus, the Supreme Head of the church and Bishop of souls. . . . He ever lives to provide for His church, and to guide and feed HIs flock." --Jonathan Edwards, in his sermon, "The Sorrows of the Bereaved Spread before Jesus"]